Use code NEXPO at https://incogni.com/nexpo to get an exclusive 60% off an annual Incogni plan. 1989: a mysterious SOS sign beckons from the Japanese wilderness. The mystery of who built it, however, remains unsolved to this day. 💾Sources: https://pastebin.com/YTiQVg49 🎶Soundtrack: https://www.youtube.com/playlist?list=PL17Q9LyEo8dfEpTZk7g9UM6kjekD19chy 🖤Support the channel: https://www.patreon.com/Nexpo 📲Stay updated: https://www.twitter.com/NexpoYT 📧Submit a Mystery: NightmareExpo@gmail.com CHAPTERS: 0:00 - Searching for the Two 3:05 - Oddly Straightforward? 8:39 - Something is Wrong 10:18 - Intermission 11:52 - A Mystery of Extraordinary Circumstance 15:33 - The Discovery in the Woods 21:05 - The Questions that Remain 23:40 - Decoding the SOS Sign Incident 29:45 - Japan's Strangest Unsolved Mystery MORE ON THE SOS SIGN INCIDENT: Barely Sociable: https://www.youtube.com/watch?v=snWvNkJCCs8- MrBallen: https://www.youtube.com/watch?v=wekABO_hraI The following content is for educational, documentary, and artistic purposes only.